Chuck.



'y 1.L;BERNARD .cH'ucK. APPLICATION FILED APR. 20, 1-915.

I A PatentedSept. 21, 1915.

wfrmssss amm-mn I@ i 4f l gm" W ww /rotating spindle,

' machine tool.

.lh/IES L. BERNARD, 0F BEAVER, '.PENNSYLVANI.'

CHUCK.

messes.

Specication of Letters Patent.

Patented 2li,

Application filed April 20, 1915. Serial No. 32,582.

To all whom it may concern Y Be it known that l, JAMES L. BERNARD, a citizen of the United States, residino at Beavertin the county o'Beaver and btate of Pennsylvania, have invented certain neW vandv useful Improvements in Chucks, of Whichthe vfollowing is a specification. l s

My invention relates to the class of tools used in attaching adi-ill orothcr rotating tool having tapered siank to the driving spindle oie. a drill press or similar rotating been the General A racthe spindle Heretofoi'e it has tice to directly attach the drill to of a machine tool in such manner that the drill is at all times positively rotated by the and as a result serious accidents to the Workmen have occurred by reason of the clothing of the workman becoming entangled in the rotating drill, in some cases even the hands or lingers of the Workman being caught or fastened and serious injury resulting therefrom.

One object o'f my invention is to provide a' chuck of novel construction having improved means tool, without being removed from the spinl fof this specification, l

showing a drill chuck con-.

die of the machine, is disconnected therefrom When the tool is not in cutting engagement with' the material being drilled or machined, i

Another object of my invention is to' provide a chuck having improved means Whereby the tool is mechanically connnected and disconnected from the spindle in the operation 'of the machine tool.

Avfurtheri object or" my invention isv to provide a-chuck having novel means Where by rotation ci? the tool by the spindle of the machine is prevented when thetool is disengaged from the material being or to be operated upon by the drill or other rotary ool. Still further objects of my invention will become apparentes will be more fully describedhereinafter and specifically pointed out in the appended claims..l

Referring to the drawings forming part Figure 1 is a plan,

partly in section, structed and arranged 1n accordance With mv invention.- Fig. 2 1s a transverse section i on the line ll-I of Fig. 1 showing the construction' of the opposed jaws forming part whereby a drill v or similar -therein With the slots 19 and 20.

of my improved chuck. Fig. 3 is a4 development of the jaws shown in Figs. 1 and 2.

ln the drawings, the numeral 2 designates the shank of a chuck having a tang 3 of the usual construction. The shank as made has the usual standard Morse taper and its lower end is provided with an enlarged portion l havin@` screw threads on its periphery. The enlarged cylindrical end l of the provided with jaw faces, these jaiv shank 2 is faces having nigh portions 6, 6, connected. T, by inclined portions to low portions 7, 8, 8.'. Opposite the shank Q-is the socket 9 ot the chuck having a tapered axially extending recess 10 in its outer end which is bored to the standard Morse taper to receive a correspoiidinglyapered shank oi the drill or other toch/flic inner end of the recess 10 opens intol or is connected to a transverse slot 11 which forms a recess to receive the flattened tang of the tool and positively conneet the socket end of the chuck With the tool. This slot also affords means for the insertion of a drift or other toolv in removing the tool from the chuck. The inner end 12 ot' the socket 9 is enlarged in diameter enlarged end is provided with jaw faces having high portions 13, 13, connected to low portions 1%, 14, by inclined portions 15, 15, similar to those on the end of the shank 2. The socket 9. ismounted so as to rotate and also to move lengthwise in a tubularsleeve 16, this sleeve being provided With a bushing 17 and having an internally threaded end by which the slee-ve is secured on the enlarged screw threaded end of the shank 2. A threaded pin 1S, positioned in a threaded hole, -ivliicli isioiined partly in the sleeve and partly in the enlarge-d end 'Ll of the shank, prevents relative rotation of the shank 2 and sleeve 16 when these parts are in assembled position. The outer end of 'the sleeve 16 is provided with opposite transverse slots or openings i9, slots or openings 2O in the bushing'l? 'register With the openings 19 so as 'to provide means or insertionv of a drift or other tool in removing the drills when the socket.A 9 is turned to register clined opening Z1 in the upper end of the sleeve 16 provides means for supplying lubricant to the interior .of thelsleeve of the chek. K

and similar r the transverse slot 11' The in terial to be drilled.

In the operationof my improved chuck, its shank 2 is inserted inthe spindle socket of a drill p ress or machine tool in which the e spindle extends lengthwise vertically. The shank of a drill or other tool is then inserted inthe tapered recess in the socket end 9 of the chuck withthe tang of the tool within the transverse slot 11. The drill spindle isv then started to rotate and the spindlei chuck and drill are lowered so-as to bring the lips oi'- the drill into engagement with the ina- Gontinued lengthwise movement of rthe spindle then brings the jaw faces 6, 7 and 8 of the shank@ into engagement with the jaw faces 13, 14. and l5 ofthe socket end 9 of the chuck. so that the -'tool in the socket 10 lis lpositively rotated withthe shank 2 as long as the drill remains in cutting engagement with the material being drilled.l The drill is then fed forvvardly or lengthwise while being rotated v 14E and l5.

until a hole of the required depth is formed bythe tool, and the spindle of -the Adrill press is then' raised so as to lift the drill from the so-formed recess or hole. Ordinar-ily, the spindle is permitted to rotatel while the drill is being moved into position tb drill the next hole. or opening in thel inaterial being 'operated upon, and it is in such situations that liability oi' accident to the vworkmen arises. lVhen the spindle is lifted to withdraw the drill from an oueniniwhich has just been formed, theweight ol" 3 oi thecnuck will the drill and socket end causethe socket end 9 'to move lengthwise in the annular sleeve so as to disengage the jaw faces 6, 7 and S from the jaw faces ifi.y Then the jaws are disengaged I there is no positive connection between the will not` rotate,

shank 2 and socket 9 of the check, as is the case when the drill 1s not 1n cutting engage- -ment with the material being cut.l Should the clothing. or hands.r of the Workman become entangled with the y drill or socket-end of the chuck when in this position, the drill although the spindle on which the chuck is inounte and the shank of thejchuck may be.' positively rotating,

Copies ol this patent may ne obtained for five cents each,

screw threaded end, an annular sleeve hav-k ing internal screw threads engaging the screw threaded end or said shank, a pin to prevent relative movement of the sha nk and sleeve, a socket mounted in said sleeve to rotate and more jaws on the opposite socket arranged to connect the socket to chuck. l

2. A chuck comprising a shank having a screw threaded end, an annular sleeve havaxially lengthwise, and ends of said shankand engage and positively the shank in using the ing internal screwi'threads engaging thel screv1 threaded end of said shank, socket mounted in said sleeve to rotate and move 'axially lengthwism'and jaws on 'the opposite ends of said shank and socket arranged to engage and positively connect the socket to e the shank in using the chuck. l

n.. chuck compiiing a shank having a recess'tlierein, socket mounted in said recess to vrotate and move axially lengthwisey and jaws on the inner end of tl'i'e recess and adjacent end of said socket arranged to enn gage and positively connect the socket to the "shanin in using the chiick.

in testimony whereof I have"hereunto set my hand.`

JAMES L. BERNARQ. Witnesses A. C. METTLER, B. O. BATEMAN.

by addressing the Commissioner ai Eatents,

"Washington, D. CJ 

